Preorders are now being accepted for Sid Meier's Civilization VI in preparation for the October 21st release of the next installment in the beloved strategy series. Those who commit in advance will be rewarded with early access to the Aztec civilization for 90 days, and in a welcome move, will be released for everyone free of charge after the 90 days pass. The Civilization website has all the details on the offer as well as the Aztecs and their leader Montezuma I, and this video offers a first look at the civilization.